Hot dip galvanizing materials shall be used in strict accordance with the drawing requirements, with correct dimensions and firm welding joints to achieve the purpose of protection. The guardrail near the foundation pit can make the construction site clean, beautiful, civilized and safe, prevent vehicles from entering and leaving the edge of the foundation pit too close to cause safety accidents, prevent constructors from falling into the foundation pit, prevent debris flow from falling into the foundation pit and cause personal injury to constructors in the foundation pit.

基坑围护装置的高度在设备的防护中起着一定的作用。基坑围护的高度从根本上决定了临边防护栏的设备高度。它是防护栏设计中的一个重要参数，其值的大小直接影响到隔离栅的造价和应用效果。

The height of foundation pit retaining device plays a certain role in the safety protection of equipment. The height of foundation pit enclosure fundamentally determines the equipment height of edge guard. It is an important parameter in the design of protective fence, and its value directly affects the cost and application effect of isolation fence.

选择屏障高度的主要因素是密度和沿线地形。在《护栏网规范》中，护栏网的高度在1.6～1.8m之间，该规则主要考虑护栏网的高度，其主要设计目的是防止翻车。据观察，如果有人想进入高速公路，通常采用破坏高速公路护栏的方法。损坏位置在1.2米以下，设置高护栏可防止行人进入，对于的危害性较大，需要考虑基坑的尺寸和浇筑混凝土的数量来适当地浇筑混凝土，以提高护栏边缘附近基坑的性。

The main factors for selecting the barrier height are density and terrain along the line. In the specification for guardrail, the height of guardrail is between 1.6 ~ 1.8m. This rule mainly considers the height of guardrail, and its main design purpose is to prevent rollover. It is observed that if someone wants to enter the expressway, the method of destroying the expressway guardrail is usually used. The damage location is less than 1.2m, and the high guardrail can prevent pedestrians from entering. It is very harmful to the. It is necessary to properly pour concrete considering the size of the foundation pit and the quantity of concrete, so as to improve the safety of the foundation pit near the edge of the guardrail.

基坑围护结构的设置应统一规划，布局布局应，以无障碍道路交通和行人交通为标准。所需出入口应设置单独的大门，施工现场应与外界隔离。基坑边护栏不应用于挡土和承重，不应依靠基坑边护栏堆叠材料。

The setting of foundation pit retaining structure shall be planned uniformly, and the layout shall be safe, taking barrier free road traffic and pedestrian traffic as the standard. Separate gates shall be set at the required entrances and exits, and the construction site shall be isolated from the outside. The guardrail at the side of the foundation pit shall not be used for retaining and bearing, and shall not rely on the guardrail at the side of the foundation pit to stack materials.

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